The mother of 18-month Palestinian baby Ali Dawabsha, burned alive in an arson attack by Israeli extremists, died from her injuries late Sunday night.

Riham Dawabsha, a 27 year old teacher, died in an Israeli hospital having suffered third degree burns to 90 percent of her body following the July 31 firebombing.

Israeli settlers were accused of smashing the windows of two homes in Duma, before throwing flammable liquids and Molotov cocktails inside, killing infant Ali and critically injuring the other family members.

Dawabsha’s husband Saad died from his injuries eight days after the attack. The couple’s remaining child, 4 year old Al, is still in hospital in serious condition.

The family's home had been destroyed by the fire and a Jewish Star of David spray-painted on a wall alongside the words "revenge" and "long live the Messiah."

Benjamin Netanyahu, Israeli prime minister, has pledged to tackle the issue, labeling the firebombing 'terrorism.' A number of extremist settlers were arrested by Israeli authorities in relation the the attack, but nearly all suspects have been released without charge.

Anwar Dawabsheh, a family member, confirmed he had been informed of Riham's death and said the funeral would be held on Monday in Duma.

It is expected her body will be returned by Israel to the Palestinian authorities at a checkpoint entrance of the West Bank, where it will be taken to her village in Duma.

The Palestinian foreign ministry in Ramallah said it had submitted a request to the International Criminal Court (ICC) in the Hague to probe the firebombing and "settler terrorism".

The attack has evoked shock and anger amongst the Palestinian community - the most recent in a line of hate crimes against Palestinians thought to be carried out by Israeli settlers.

According to the UN Office for the Coordination of Humanitarian Affairs, Israeli settlers have carried out at least 142 attacks on Palestinians in occupied East Jerusalem and the West Bank since the beginning of this year.